The material to be ground is fed into the mill by gravity, cut between the rotating and stationary blades and then discharged through the screen at the bottom part of the housing. Due to the variable rotor speed and ex­change­able screen inserts, particle sizes of a few centimetres down to 1 mm are reached. Depending on the product as well as the desired fineness, a throughput of up to 1000 kg/h can be achieved on a US11.